(19)

(11)

EP 1 994 444 A1

(12)

(43) Date of publication: 26.11.2008 Bulletin 2008/48 (21) Application number: 07712603.5 (22) Date of filing: 13.03.2007

(51) International Patent Classification (IPC):  G03B 7/085(2006.01) H01M 4/02(2006.01) (86) International application number: PCT/FI2007/000061 (87) International publication number: WO 2007/104829 (20.09.2007 Gazette 2007/38)

(84) Designated Contracting States: AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC MT NL PL PT RO SE SI SK TR (30) Priority: 15.03.2006 US 377905 (71) Applicant: Nokia Corporation 02150 Espoo (FI)	(72) Inventor: EROMÄKI, Marko FI-33820 Tampere (FI) (74) Representative: Brax, Matti Juhani  Berggren Oy Ab, P.O. Box 16 00101 Helsinki 00101 Helsinki (FI)